With goalkeeper Wojciech Szczesny beaten the 20-year-old used his hand to divert the ball past the post.

Although instant replays suggested the ball was heading wide anyway the referee had no choice but to dismiss him.

Except for Marriner it seems, as he sent Gibbs off for an early bath rather than Oxlade-Chamberlain.

After discussions at half time Marriner apparently acknowledged his mistake.

The FA also took to Twitter following the incident to clarify the rules on the appeals process for such instances.

"Clubs can appeal mistaken identity to the FA, although the FA can pro-actively review also," they posted.

"Following a red card clubs can also review possibility of a wrongful dismissal claim to the FA, unless dismissal is for 2 yellow cards."

The 16th minute incident compounded a nightmare start to Arsene Wenger's 1,000th game in charge as goals from Samuel Eto'o, Andre Schurrle and Hazard's resulting penalty saw the Blues jump out to a 3-0 lead.